12811860720 has 100 divisors (see below), whose sum is σ = 44497512840. Its totient is φ = 3416494464.

The previous prime is 12811860703. The next prime is 12811860731. The reversal of 12811860720 is 2706811821.

12811860720 is a `hidden beast` number, since 1 + 28 + 1 + 1 + 8 + 607 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 982090 + ... + 995049.

Almost surely, 2^12811860720 is an apocalyptic number.

12811860720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12811860720 is an abundant number, since it is smaller than the sum of its proper divisors (31685652120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12811860720 is a wasteful number, since it uses less digits than its factorization.

12811860720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977164 (or 1977149 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 12811860720 in words is "twelve billion, eight hundred eleven million, eight hundred sixty thousand, seven hundred twenty".